Electric vehicle control device and electric vehicle

Abstract

This electric vehicle control device is provided with: an efficiency control unit which, during travel of the electric vehicle, in a state in which the battery is prone to deteriorate, increases the rate of consumption of the power charged in the battery by performing control for reducing the efficiency of the motor; a travelable distance calculation unit which calculates the travelable distance of the electric vehicle using the SOC of the battery and a travel coefficient; and a travel coefficient correction unit which, before and after the efficiency control unit performs control for reducing the efficiency of the motor, corrects the travel coefficient such that change in the travelable distance calculated by the travelable distance calculation unit is reduced.

What is claimed is: 
     
       1. An electric vehicle control apparatus that controls an electric vehicle equipped with a chargeable and dischargeable battery, an electric motor that drives a driving wheel by being supplied with electric power charged in the battery, and an inverter that converts DC power charged in the battery into AC power and applies the AC power to the motor, the electric vehicle control apparatus comprising:
 a memory configured to store a program; and 
 a processor configured to execute the program to: 
 perform control of reducing efficiency of the motor and thereby increases a consumption rate of the electric power charged in the battery, when the electric vehicle is running and the battery is in a state in which the battery is liable to deterioration; 
 calculate a distance to empty for the electric vehicle using a state of charge (SOC) of the battery and a running factor; and 
 correct the running factor in response to the control of reducing the efficiency of the motor is performed to reduce changes in the distance to empty when the changes are compared before and after the control of reducing the efficiency of the motor is performed. 
 
     
     
       2. The electric vehicle control apparatus according to  claim 1 , wherein the running factor is corrected such that the distance to empty remains unchanged when the distance to empty is compared before and after the control of reducing the efficiency of the motor is performed. 
     
     
       3. The electric vehicle control apparatus according to  claim 1 , wherein the state in which the battery is liable to deterioration is a state in which the SOC of the battery is in a predetermined range in which the battery is liable to deterioration. 
     
     
       4. The electric vehicle control apparatus according to  claim 1 , wherein the state in which the battery is liable to deterioration is a state in which a deterioration rate of the battery that is determined in accordance with a value of the SOC is equal to or higher than a predetermined rate. 
     
     
       5. The electric vehicle control apparatus according to  claim 1 , wherein the processor is further configured to decrease a lower limit of an operating range of the SOC of the battery when the control of reducing the efficiency of the motor is performed. 
     
     
       6. An electric vehicle, comprising the electric vehicle control apparatus according to  claim 1 .